Si non potes reperire Berolini in tabula, ludens essetis non WIF.
Hey, get your stinking cursor off my face! I got nukes, you know.
CW and French may not combine in the same land attack.
But ground STRIKE is not part of land attack (unlike ground support) - completely separate action. So yes, the CW may ground strike German units in a given hex and let the French attack that hex during land combat.